Purge System

Our Market leading Purge and Pressurisation safety device ensures the safe operation of electrical machines and enclosures within Zone 1/21 and 2/22 hazardous areas. The unique attributes of this system provide numerous advantages over its competitors.

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PP1214 is designed in accordance with IEC 60079-2:2014 Ed 6/ EN 60079-2:2007, ensuring a pressurised and leakage compensated enclosure. This creates a non-hazardous atmosphere inside the enclosure by keeping a positive differential pressure between the pressurised enclosure and atmospheric pressure to ensure that no potentially explosive gases enter the electrical equipment.

This type of protection consists of two main stages:

Purge Cycle:
Activated when the electrical machine is OFF prior to being switched ON. Clean air/inert gas is blown through the machine and monitored to ensure compliance with IEC 60079-2:2014 Ed 6/ EN 60079-2:2014.

Leakage Compensation and Pressurisation Cycle:
Once purge cycle is satisfactory the machine is considered non-hazardous and ready to be switched ON. A positive differential pressure to atmospheric has to be maintained. This is achieved by compensating for any air/inert gas leakages that the machine might have.

System advantages

  • Less pneumatic connections, reducing installation time
  • One size fits all
  • Minimum supply pressure of 3 barg
  • Fully automatic electronically controlled system, reducing commissioning time i.e. No need to change outlet valve orifice plate to achieve correct flow rate
  • Automatic machine leakage compensation display, which is crucial information for machine maintenance
  • LCD information display
  • Up to 4250 ls/min [standard litres per minute] automatic leakage compensation i.e. no additional “BOOST” device needed to increase leakage compensation
  • Local or remote control/monitoring
  • No pneumatic logics used, minimising maintenance and the possibility of faults, due to leakages. > Risk of failure minimised due to simplified layout – fewer components needed

Models

Models

Model Controls

Leakage Compensation

Certification

PP1214.1.1

Remote

Manual ball valve

* ATEX

PP1214.2.1

Local

Manual ball valve

* ATEX

PP1214.3.1

Remote

Automatic electrical solenoid valve

* ATEX

PP1214.4.1

Local

Automatic electrical solenoid valve

* ATEX

PP1214.1.2

Remote

Manual ball valve

** ATEX and IEXEC

PP1214.2.2

Local

Manual ball valve

** ATEX and IEXEC

PP1214.3.2

Remote

Automatic electrical solenoid valve

** ATEX and IEXEC

PP1214.4.2

Local

Automatic electrical solenoid valve

** ATEX and IEXEC

*Ex d e [ib] [pxb] IIB T4 Gb
Ex tb [pxb] [ib] IIIC T135°C Db

**Ex d e [ib] [pxb] IIC T4 Gb
Ex tb [pxb] [ib] IIIC T135°C Db